But "the train to London" doesn't just go to London, does it? It stops a few miles up the road, then a few miles further, and a few miles further again. How many passengers per week get on a train at Plymouth and don't get off till they reach London - are there figures for that?
Had a look at rail times to London. 3-3.75 hours, basically hourly, some trains make only four stops, some a lot more. Surprised it took that long.